Originally Posted by Summit1986
Hi there, well it's to my understanding from selling high end speakers at BestBuy for years back in the day (5 years ago). Harmon Kardon uses the same technology as the Parrot Zik head phones using microphones built into the speakers to produce a negative frequency that counteracts the positive frequencies outside the car (road noise). You can't bypass this. I would take it into the dealership and have them look at this, and you may have a defect which needs tending to via the warranty. This feature from the 19 speakers you were graced with just allows for noise cancellation outside the vehicle.
HOWEVER, I will say you could bypass this by disconnecting the Bluetooth from your overhead controls by opening the area and disconnecting the wiring harness. YOU WON'T be able to use Bluetooth, I know that blows because that is a nice feature with the Summit and touch screen features. I hope this helps. The noise sounds like feedback am I correct?
The microphones are in the headliner and can be physically disconnected. Some have replaced the subs and had some incorrect crossover feedback and disconnecting the noice xcel mics eliminated the feedback.
Jeep Grand Cherokee WK2 - Active Noise Cancellation
Feature introduction: 2015 model year
Availability: Standard on Grand Cherokee Summit and SRT models
The Active Noise Cancellation System is system is designed to address the change in exhaust noise whenever the vehicle is operating in Fuel Economy Mode (ECO) or 4 cylinder mode. The system relies on four microphones embedded in the headliner to detect the exhaust drone and prompt an onboard frequency generator to create counteracting sound waves through the audio system's speakers and sub-woofer. This helps keep the vehicle quiet at highway speeds.
The Active Noise Cancellation (ANC) module is a stand-alone module on SRT vehicles equipped with the Alpine audio system. The module is located behind the right rear quarter trim panel. On models equipped with the Harman Kardon audio system, the module is integral into the audio amplifier located behind the left quarter trim panel. The ANC system also includes 4 microphones located in the headliner. These microphones are serviced separately from the headliner.
The Active Noise Control (ANC) module performs the creation of signals appropriate to cancel engine order related vehicle noises from the engine. It creates these signals in proportion to the Engine RPM plus any other needed input.
The ANC module obtains the engine RPM from the vehicle Powertrain Control Module (PCM).
The signals that the ANC module creates includes at least four simultaneous signals equivalent to sine wave frequencies in designated ratios tracking the engine RPM, to cancel engine order related noises, plus other optional signals that can enhance the cancellation effect.
To maintain the effectiveness of the noise cancellation over the full range of vehicle operating conditions and seating locations, the ANC module has four outputs and process signals from four microphone assemblies located in the headliner.
The ANC module supports mixing the four ANC signals into any output channel at a point after all of the signal processing required
The ANC module operates on vehicle battery power and has its state of operation controlled by CAN-B bus messages.
In addition to performing active noise cancellation, the ANC module supplies power to the loudspeakers.